Continuous annealing-furnace.



F. lNGRAHAMfl D. LYNCH.

CONTINUOUS ANNEAUNG FURNACE.

APPLKCATION FILED DEC. 16. 1913.

Patented July 2?, 1915.

n N m E 2 W z 7 @M SW A 1W fi F INGHAHAM & D. LYNCH.CONTiNQOUSA'NNEALINGFURNACE;

APPLICATION FHID DC.16, 1913f Patented my 27, 1915.

2 SHEETS-SHEET 2.

iNVEINTOR annealed TATLEF ?Eifl ,@l l l @FlTlUP-Q s ETREDERICK INGRAHAMAND DANIEL LYNCH, F JOLIET, ILLINOIS. ASSIGNOBS TO THE AIJL'ERICAN STEELAND WIRE COMPANY OF NEW JERSEY, OF HOBOKEN, NEW

JERSEY, A CORPORATION OF NEW JERSEY.

CONTINUOUS ANNEALING-FURNACE.

Specification of Letters Patent.

Patented July 27', 1915.

Application filed December 16, 1913. Serial No. 807,114.

To (ZZZ 1 0712, it may; concern:

lie it known thatwe, Fnnnnniolt INGRA- irur and DAXIi-IL LYNCH, bothcitizens of the llnited f llies, and residents of Joliet, in the countyof lr'ill and State of Illinois, have invented certain new and. usefulTmproreinents in Qont-ii'iuous Annealing-Furnaces, of which thefollowing is a specification.

()ur inventionn'clates to heating apparatus emplo -red in the art ofannealing, and more particularly relates to apparatus used in annealingblack and galvanized wire, liats and similar rolled shapes, chain bothhlack and gaIJaniZed, and like flexible materials of small cross sectionand comparatively rait length.

Two types of furnaces have been in general service heretofore in theproduction of annealed wire. The first and oldest, which known as thestill or pot annealing turnow, is one in which the wire vhih: lacingstationary or at rest. the wire ozone in the form (it coils or bundlesThe second type of which our invention is an im provco'lcnt is acontinuous heating furnace in the use of which a. series of strands ofwire are passed continuously through the annealing media, the wireacquiring the proper annealing: temperature in traveling through thefurnace, and, after emerging therefrom. luring wound into coils orformed into bundles. l

'lwo forms oi continuous annealing furou' s have been used heretofore,the older oi the two comprising a, furnace having brirlc archesconstructed to span suitable lire box, or (-k'nphustion chambers and.lines, with small extending through the brick arches lengthwise parallelwith the length of the furna e. and 1hrllllllYltllllll wires passing,siue'l v through one or another of the sem o'r' so formed holes in beingheated and auuealwl The second type of coin tinuous annealing furnaceused heretofore comprises shallow metallic pans or containers mountedabove combustion chambers and liars. llupans or ontainers being lilledto 'srlllabh depth with molten lead. lo

horirontally extending holes this type of furnace two or more pans orcontinuous furnaces described, both black and Q'alvanr/ed wire aretreated in belng' annealed. The wire or other product being annealedusually is coated with a film of grease or other lubricant which becomesapplied thereto in a prior forming operation,

as for example, in the case of wire in the wire drawing operation, andin annealing wire with either oi the above types of fun nace the greaseor lubricant coatingis burned oil. In the use of shallow pans to formthe lead baths large quantities of lead are lost through being oxidized,as well as lSltlPG of heat by radiation owing to the large surface ofthe lead contacting With-the atmosphere.

()no object of our invention is to provide a a-ontinuous annealingfurnace of improved construction having novel means whereby the wire isheated to the desired aimealing temperature and loss of lead; or otherma terial forming the molten bath or annealing medium is :woidcd andovercome.

l lnother object of our invention is to provide a furnace lmving novelmeans whereby the losses through the escape of heat performing no usefulservice are lessened and prevented. i

A further object of our invention is to provide a continuous 'fnrnace.having novel means for heating the materials being annealed withoutdirect exposure thereof to the oxidizing gases or procanzts ofcombgstion and for increasing the time interval during which thematerials are being heated without increase in this ovo'all length of.

the l'uri'iace.

A. still further object of'our invention is to provide a furnace ofnovel constructim'i having improved means whereby variations in thetemperature to which, the materials are heated in dill'ereut porl'ons ofthe farat the same time is effected. 1

nace are. n1 ade possible, and annealing of dillerent classes, sizes orgrades of materials dieterring to the drawings forming part of thisinvention, Figure 1 is a. longitudinal and arranged in accordai'iee withour invention. Fig.3 is a plan partly in-sectlon of the furnace of Fig.1, the sectional lower half 'of' the plan beingtaken-on the line I1:IIof Fig; 1. Fig. 3 is an end elevation,

partly in section, the section being taken on 1'5 the line IIII1I ofFig. 2.

tion'a] end ele 'ation taken on the line IV.-1V of Fig. 2.

bricks used in constructing our improved furnace. Fig.0 IS a detaillongitudinal side elevation showing the construction of the bent tubesforming the containers ,for the molten bath forming part of our improvedfurnace.

' iii) In. the accompanying drawings the 11'1- nierals 2 and 3 designatefurnace which are separated by the division Wall 4 and each of whichfurnaces is provided with a stack out let 5 or (5 by which thecombustion chambers are connected thlOifgll the heating chambers to theflue 7 lea ng' to av stack,- (not shown) which is convenientlylocated.at one side of the furnaces. The combustion chambers 8,

h, of the furnaces each. have a door 9 thro 'h which the fuel isinserted and a reel grate it), suitable outlets being provid' i for theremoval of ashes from the ash p ts 11. The combustion chambers 8, 8, and

. iii-ct onone side orend into the endof longitudinally extending finesor heating chainhers I! which'extend lengthwise for the entire length ofthe furnace, and the chainbers l2 and the combustion Cllilll'lbOl'coniiec ted to one end thereof are provided with an arched roof 13extending from the furnace side walls and constructed of shape bricksand forming a partition wall as will be described. The rear ends of thechambers 12 are connected b the transverse recesses 14, which are formedin the side walls of the furnace, with the return lines orheatingchan'ibin-s l5, 15, which are located above the arched roof l3and the outlet ends of the chambers 15 are connected by the stackoutlets a and (v to the stack line 7. The upper heatiut chambers areeach covered. with a reuu-nablesectional roof, the roof being arched andhem made in sections 16 so that one or all of the sections can bereadily removed and replaced in position.

when found necessary or desirable. Located within the upper heatingchambers 15 and ging thereof when heat Fig. 4- is a sec 1 .hxed to theouck g 5v is a perspective view' furnadeand mounted on the shaft .20 isa. showing the construction of the slotted arch healed bein freelypassed pipes 19, these tubes having bent ends 19 which extend upwardly.so as to fori-nclosed wires or othen material being annealed 'be ingpassed into and through the tubes. or containers in a continuous manner.tubes '1 are supportedfat intervals inithe lengtl. thereof bv m'ei's 15-Positioned at Thev to prevent sagthe rear end of the furnace is a shaft20 4 n'i'ounte'd in suitable bearings 21 which are staves on the endofthe grooved drum having a series of parallel grooves so as to fill thestraight or horizontal por-' tions thereof theupwardly bent ends 19 ofthe itube s preventing the molten lead or other niediui-u fromi'lowingout of the tubes while permitting the materials beingantheretlniough at any desired speed.

In our improved furnace construction. the only portions of the surfaceof the n'iolten lead 2-l which are iilirectlv exposed to the atmosphereare those at .18 ends of the tubes 19. and as the entiri surface of thelead in the horizontal portions of the tubes is in contact with thesurface of the tubes, the heat transmitted to the lead through the wallsof the tubes is much gllQilttlFtlltlll where open topped pans orcontainers are employed and the loss from oxidation is greatly reduced;

As will be seen from Fig. 5 the arch bricks of which the arched roof orpartition wall 13 selnii'ating the lower heating chambers 12 from theupper heating chambers 15 of the furnace is formed. have lengthwise eX-tending slots or grooves 2-? in each side thereof, so that when thebricks are placed in position to form the roof or wall 13 the adjacentslots 25 in adjoining: sides of the bricks register to form an elongatedpassage which extends from end to end of the bricks. 'lhe openings '35in the faces of one brick ill0.:ill'2l11} ,'0(l to register with thosein the faces of the adjacent brick of the next row. of bricks, and aseries of continuous openingg's 25 are in this way formed in the archedroof which extend from the inside ofone to the outside of the other endof theit'un nace. A rusting" forming an end plate 2%; ha viing opw Iopenings 2:) is secured. at each end of the furnace against the endwalls thereon.

fOl'lDGfllIl the periphery thereof at spaced ii'itervals registeringwith the loo ends opening outside of said heating lialn- In. testimonywhereof, We have hereunto lXF-Hnd forming a closed container for a setour hands.

molten annealing lnedilnn' throughwliiuli FREDERICK lNGliAIlAMJ'inaterials annealed are passed .in the an- 'D;\N.IJ-LL LYNCH. 5 nealingopm'ations,-a1nl means at the end of \Yitnesses:

'the furnace for changing the direction of JunxlV. LEWIS,

trawl of the materials being annealed. E. \Yoons.

